如果文件的列匹配，则AWK可以过滤文件

Question

I basically am working with two files (file1 and file2). The goal is to write a script that pulls rows from file1, if columns 1,2,3 match between files1 and files2. Here's the code I have been playing with:

awk -F'|' 'NR==FNR{c[$1$2$3]++;next};c[$1$2$3] > 0' file1 file2 > filtered.txt

ile1 and file2 both look like this (but has many more columns):

name1 0 c 
name1 1 c
name1 2 x
name2 3 x
name2 4 c
name2 5 c

The awk code I provided isn't producing any output. Any help would be appreciated!

Answer 1

your delimiter isn't pipe, try this

$ awk 'NR==FNR {c[$1,$2,$3]++; next} c[$1,$2,$3]' file1 file2 > filtered.txt

or

$ awk 'NR==FNR {c[$0]++; next} c[$0]' file1 file2 > filtered.txt

however, if you're matching the whole line perhaps easier with grep

$ grep -xFf file1 file2 > filtered.txt

Answer 2

awk '{key=$1 FS $2 FS $3} NR==FNR{file2[key];next} key in file2' file2 file1